Minecraft v1.14.4
Endergetic Expansion v1.1.2

• The first recipe error is for endergetic:poise_slab_from_vertical, the logs says it's because the output has a / in the id.
• Same for the endergetic:eumus_brick_slab_from_vertical, it has a / in the output.

Do you have Quark installed

Yes

But the error is because the output is incorrectly defined. I checked the recipe file for it, and it says the output is /endergetic:poise_slab. Same for the other one. It shouldn't have the backslash there.

Will fix 👍